Stihl BR550 no spark

Have a BR550 that has intermitent no spark. Sypmtoms have been. 
Dies when blowing leaves. Starts right back up on one pull. Didnt die until it got hot, about 20 minutes. 
Now it wont start. 
 
I removed flame arrester from muffler. Replaced fuel filter in tank, and primer bulb as it had a hair line crack in it. Had to remove carb partially from cylinder to do so. 
 
I have tested the kill circuit with a meter by disconnecting blue and black wire from coil. It tests correctly on Ohm meter when kill switch is turned on and off. 
 
Cleaned magnets on pully to ensure not the issue. 
 
Replaced the spark plug. Removed it, attached to ignition wire and grounded plug. With lights off in my garage I saw no spark. 
Repeated process several times and got spark only once. Also hooked meter to two spades on coil with leads to kill switch off. 
Shows voltage when I pull starter cord. 
 
Has anyone had similar success fixing above? My experience is a coil dies or gives spark. I dont want to throw parts at this but am leaning toward a coil? 
 
Any input would be appreciated.